Heat insulating cover and micrometer

Abstract

Disclosed is a micrometer with an improved a heat-insulating property. A micrometer 10 with a U-shaped frame 20 supporting an anvil 12 and a spindle 14 at tip end portions thereof so that the anvil 12 and the spindle 14 are coaxially opposed to each other is provided with a heat insulating cover 50 . The heat insulating cover 50 is shaped to accommodate a bottom portion of the frame 20 , and is detachable with respect to the frame 20 . The heat insulating cover 50 covers a bottom face 22 of the frame 20 while supporting the bottom portion of the frame 20 by sandwiching from both sides of the frame 20.

1. A heat insulating cover for a micrometer, the micrometer including a U-shaped frame supporting an anvil and a spindle at tip end portions thereof so that the anvil and the spindle are coaxially opposed to each other,
 wherein the heat insulating cover is shaped to accommodate a bottom portion of the frame, and is detachable with respect to the frame, said heat insulating cover covering a bottom face of the frame while supporting the bottom portion of the frame by sandwiching from both sides of the frame; 
 a first cover portion and a second cover portion engaging with a first face and a second face of the frame, respectively, the first face and the second face opposed to each other; 
 an elastic body in each of said first and second cover portions and biasing the first cover portion toward the first face and the second cover portion toward the second face; and, 
 wherein the elastic body comprises a flat spring or a coil spring provided from the first cover portion to the second cover portion so as to cover the bottom face of the frame. 
 
     
     
       2. The heat insulating cover according to  claim 1 , further comprising hooks engaging with recesses formed in the first face and the second face of the frame, the first face and the second face opposed to each other. 
     
     
       3. The heat insulating cover according to  claim 1 , wherein said first cover portion has a first inner face that cooperates with said first face to define a first space and said second cover portion has a second inner face that cooperates with said second face to define a second space. 
     
     
       4. The heat insulating cover according to  claim 3 , wherein
 each of the inner faces is provided with a rib that protrudes toward the frame. 
 
     
     
       5. The heat insulating cover according to  claim 4 , wherein
 the rib is in a sheet-form with an end face thereof directed to the frame. 
 
     
     
       6. The heat insulating cover according to  claim 3 , wherein
 the each of the inner faces is provided with a protrusion protruding toward the frame, and 
 the heat insulating cover is fastened to the frame at the protrusion. 
 
     
     
       7. The heat insulating cover according to  claim 1 , further comprising a bottom face allowing the micrometer to self-stand, while accommodating the frame. 
     
     
       8. A heat insulating cover for a micrometer, the micrometer including a U-shaped frame supporting an anvil and a spindle at tip end portions thereof so that the anvil and the spindle are coaxially opposed to each other, said heat insulating cover comprising:
 a base and a rotating part that rotates with reference to the base, wherein 
 a bottom face of the cover comprises a continuous flat face including lower faces of the base and the rotating part, and 
 the rotating part is rotatable from a state of the flat face formed with the lower faces of the base and the rotating part until the rotating part covers the bottom face of the frame; 
 wherein said heat insulating cover is shaped to accommodate a bottom portion of the frame, and is detachable with respect to the frame. 
 
     
     
       9. The heat insulating cover according to  claim 8 , wherein
 the rotating part comprises a latch that is latched with the bottom face of the frame while covering the bottom face of the frame. 
 
     
     
       10. The heat insulating cover according to  claim 8 , wherein
 the rotating part comprises a latch that is latched with the base while forming the flat face. 
 
     
     
       11. A micrometer, comprising:
 a U-shaped frame supporting an anvil and a spindle at tip end portions thereof so that the anvil and the spindle are coaxially opposed to each other, 
 a heat insulating cover that is shaped to accommodate a bottom portion of the frame, and is detachable with respect to the frame, said heat insulating cover including a first cover portion and a second cover portion that cooperate to cover a bottom face of the frame while supporting the bottom portion of the frame by sandwiching from both sides of the frame; 
 wherein said first cover portion and said second cover portion engage with a first face and a second face of the frame, respectively, the first face and the second face being opposed to each other; and 
 wherein an elastic body in each of said first and second cover portions and biasing the first cover portion toward the first face and the second cover portion toward the second face; 
 wherein a bottom face of the heat insulating cover allows the micrometer to self-stand; and, 
 wherein the elastic body comprises a flat spring or a coil spring provided from the first cover portion to the second cover portion so as to cover the bottom face of the frame. 
 
     
     
       12. The micrometer according to  claim 11 , further comprising hooks engaging with recesses formed in the first face and the second face of the frame. 
     
     
       13. The micrometer according to  claim 11 , wherein said first cover portion has a first inner face that cooperates with said first face to define a first space and said second cover portion has a second inner face that cooperates with said second face to define a second space. 
     
     
       14. The micrometer according to  claim 13 , wherein each of the inner faces is provided with a rib that protrudes toward the frame. 
     
     
       15. The micrometer according to  claim 14 , wherein
 the rib is in a sheet-form with an end face thereof directed to the frame. 
 
     
     
       16. The micrometer according to  claim 13 , wherein
 the each of the inner faces is provided with a protrusion protruding toward the frame, and 
 the heat insulating cover is fastened to the frame at the protrusion. 
 
     
     
       17. The micrometer according to  claim 11 , said heat insulating cover further comprising:
 a base and a rotating part that rotates with reference to the base, wherein 
 the bottom face of the cover comprises a continuous flat face including lower faces of the base and the rotating part, and 
 the rotating part is rotatable from a state of the flat face formed with the lower faces of the base and the rotating part until the rotating part covers the bottom face of the frame. 
 
     
     
       18. The micrometer according to  claim 17 , wherein the rotating part comprises a latch that is latched with the bottom face of the frame while covering the bottom face of the frame. 
     
     
       19. A heat insulating cover for a micrometer, the micrometer including a U-shaped frame supporting an anvil and spindle at tip end portions thereof so that the anvil and the spindle are coaxially opposed to each other, wherein:
 the heat insulating cover is shaped to accommodate a bottom portion of the frame, and is detachable with respect to the frame; 
 the heat insulating cover has an inner face forming a space with the accommodated frame; and, 
 the inner face is provided with a rib protruding toward the frame. 
 
     
     
       20. The heat insulating cover according to  claim 19 , wherein
 the rib is in a sheet-form with an end face thereof directed to the frame. 
 
     
     
       21. The heat insulating cover according to  claim 19 , wherein the inner face of the heat insulating cover is provided with a protrusion protruding toward the frame, and
 the heat insulating cover is fastened to the frame at the protrusion. 
 
     
     
       22. The heat insulating cover according to  claim 21 , further comprising a bottom face allowing the micrometer to self-stand, while accommodating the frame.